Brake shoe



Jan. 17, 1928. 1,656,638

J. KEEGAN BRAKE SHOE Filed Auz. 26, 1926 i7 5 lb W ii W $35 j NVENTOR Mia WYjM/W ATTORNEY Patented Jan. 17, 192%.

UNITED STATES JOHN IKEEGAN, F

BRAKE new Yonir, n. Y.

sI-ron.

Application filed August 26, 1926. Serial no. 131,?86.

The device, the subject of this invention is an adjustable brake shoe and support" therefor and the particular object of the in rention is to make it possible to employ a shoe that will wear longer than the shoe now used and to adjust the position of the shoe.

iliiillie shoes generally consist of a body member and an insert. The insert is removable and is removed when worn to a predetermined point The limited space makes it necessary :i'or the thickness of the insert to be limited, which occasions frequent changes ot' inserts. The unused portion of the insert is a loss as it becomes scrap metal of very low value.

Another object of this invention is, then, to overcome the necessity for frequent changes and to reduce the amount of scrap and I have so constructed my brake shoe and the supporting means therefor that the adjustment to the so-called second wear position may be very quickly made.

The following is what I consider the best means of carrying out my invention and the accompanying drawing should be referred to for a con'lplet-e understanding of the specification which follows.

In the drawing Fig. 1 shows in side elevation, a portion of a wheel with the brake shoe in operative relation tl'ierewith.

Fig. 2 is an enlarged, sectional view of brake shoe.

Fig. 3 shows a brake lever o't modified vmisti'rmtioii.

Fig. 41 shows a brake shoe adapted to be employed with the lever shown in Fig. 3.

.llig. 5 shows in side elevation a beam supported adjustable brake shoe.

Fig. 6 shows in side elevation a two piece adjustable brake shoe.

Similar reference numerals indicate like parts in all the figures where they appear.

At 5 in Fig. 1, I show a car wheel and at 6 a brake lever with the brake operating rods 7 and 8 attached thereto and the supporting link 9 in position. All of these parts are of ordinary construction, shape and size, and their location need not be changed from the ordinary, for use with my brake.

The plurality of holes 10 in the rod 8 are the adjustment holes now found in similar rods.

My brake shoe is shown at 11 and consists of a particularly heavy faced member the the thickness of this member being ap proximately twice the thickness of the usual perforations and through the brake lever 6,

and when the shoe is worn to the line 13, the pin 18 is removed, the shoe advanced toward the wheel 5 and the pin inserted into the outer perforation 16. The link 9 should of course be maintained upon the pin 18.

I provide :1. plurality of ribs as shown at 19, :20 and 21 for supporting the lugs l t and 15, and these ribs may be ordinary webs of desired thickness.

I call particular attention to the Ushaped insert member 22 arranged between the lugs ll and 15. This insert member should be or sheet steel, should be provided with periorations 23 and should be placed in the mould before the brake shoe is cast so that the easting metal may enter the perforations 23, to secure the U-shaped member 22 in position. It will be noted that my shoe is provided with an ordinary flanged overhang 24.

In F 3 and 4, I show a combination of a brake shoe and lever, but in this combination the lever is provided with a plurality of perforations 24:, and the lugs 25 of the brake shoe are of less Width and are provided with a single perforation 26.

It will be understood that the same adjustment can be obtained through this complurality of outstanding lugs perforated at 31 to provide for adjustment.

I may provide the ordinary means for preventing chipping of the brake shoe but such means are so well known that I deem it unnecessary to show or describe them.

I desire to emphasize that my brake consists preferably of an integrally formed shoe with projecting lugs constituting a large mass of metal which will more readil dissipate the heat caused by the frictional engagen'ient of the brake to wheel during the braking action, and which will result in increased elliciency, due to a cooler shoe and increased co-el'licient of friction. adding;- inatcrially to the life of the brake shoe.

Modifications may be made within the Scope of the appended claims, without de parting; from the principle or sacrificing the adwintages oi the invention.

Having carefully and fully described my invention, what 1 claim and desire to obtain is 1. A metallic brake shoe having a heavy faced n'ieinber and a supporting lug 'lornied integral therewith, said leg being proi 'ided with a plurality of perforations to allow the position of said shoe to he changed at will.

2. A brake shoe having a plurality ol lugs formed integral therewith and a sheet metal member between said lugs.

3. A brake shoe having a plurality of lags formed integral therewith, a wear indicating rib upon an exposed surface of said shoe, a U-shaped member between said lugs, said lugs and said U-shaped member being provided with a plurality of perforations.

at. A brake shoe having an elongated supporting lugformed integral therewith, said lug being provided with a plurality oi perforations to allow the position of said shoe to be adjusted.

Signed at the city, count and ritaie of New York, this 19th day of April, 1926.

JOHN KEEGAN. 

